2.7.1.160 by Blue Sepharose column chromatography 2.7.1.160 by nickel affinity chromatography 2.7.1.160 His6-tagged wild-type RslTpt1 and mutant R16A/H17A/R64A/R119A RslTpt1 from Escherichia coli strain L21(DE3)-CodonPlus by nickel affinity chromatography, ultrafiltration, and gel filtration 2.7.1.160 immobilized metal ion affinity chromatography, > 80% purified by SDS-PAGE 2.7.1.160 KptA-His6 10% purified by sonication, immobilized metal ion chromatography, centrifugation 2.7.1.160 Ni-agarose chromatography 2.7.1.160 partially purified 2.7.1.160 partially purified as a His6-tagged protein 2.7.1.160 partially purified by Blue sepharose column chromatography 2.7.1.160 partially purified by chromatography on heparin-agarose